Dropping a penny from the Empire State building won't kill someone. The penny will top out at 50 miles per hour, which isn't fast enough to kill.

Blondes and redheads are not "going extinct." Genes do not go extinct. Recessive genes, like the gene for red or blonde hair color, can be carried from generation to generation without emerging as a hair color.

The color of your snot doesn't indicate if you have a bacterial or viral infection — It can vary from clear to yellow to green with a variety of illnesses.

Pure water doesn't conduct electricity well. The reason we can get shocked when standing in electrified water is because water we come across will be contaminated by minerals, dirt, and other things that will conduct electricity.

Organic food isn't free of pesticides. However, pesticide levels on both organic and non organic foods are so low that they aren't of concern, according to the USDA.

Stress doesn't play a large role in chronic high blood pressure. Acute stress can temporarily increase blood pressure, but overall it's not a main cause of hypertension. Things like genetics, smoking, and a bad diet are much bigger factors.

Lemmings do not commit mass suicide. During their migrations they sometimes do fall off cliffs, if they wander to an area they are unfamiliar with.

You are not born with all of the brain cells you will ever have. There is ample evidence that the brain continues to produce new cells in at least a few brain regions well into adulthood, through a process called neurogenesis.

Many people would call the dinosaur below a Brontosaurus — even Michael Crichton did in Jurassic Park — but it is actually called the Apatosaurus. The myth was started by two feuding paleontologists during the Bone Wars, 130 years ago.

People don't use "just 10%" of their brains. We use the entire brain for different processes at different times. We couldn't survive if we scooped out 90% of it.

Only a small percentage of people with Tourette syndrome randomly yell out swear words — it actually encompasses a lot more than that, including involuntary movements and different sound tics. The swearing tic is called coprolalia.

During the early Middle Ages, virtually all scholars maintained that the Earth was round, not flat. The myth that people thought the Earth was flat was started in the 1940s by the Members of the Historical Association.

The Northern Hemisphere of the Earth is not closer to the sun when it is summer. It is warmer in the US during summer because we are tilted toward the sun, so its energy hits us more directly.

The Great Wall of China isn't the only man-made structure visible from space. Depending on your definition of space, either you can still see other man-made structures, or you can't see it or other structures. From something like the Moon, you can only see our lights.

There is no such thing as someone having a "photographic" memory — only very good memories. Even people with exceptional or autobiographic memories don't recall events with visual details precise enough to mimic a camera.

Microwave radiation won't cause cancer, it just heats food up. In fact only a few types of radiation cause cancer, and these depend on the dose — just like radiation from the sun can cause skin cancer but just enough helps your body make Vitamin D.